Just incase anyone needs oil and a filter. Opie oils are doing a service pack for the GTI which includes 6 litres (so 1.4 litres spare) of castrol edge long life oil with a oil filter for £49.59. Use code FREESHIPAUG until sunday for free delivery. You also need to register, use any of the vw sites and you get the same discount.
Don't worry, I don't work for them, just got the email and thought it was a great deal.
Non long life castrol edge is around £44